Catalyst for synthesizing dimethyl carbonate through indirect vapor phase method and preparation method of catalyst

A technology of dimethyl carbonate and catalyst, which is applied in the field of catalyst and its preparation for gas-phase synthesis of dimethyl carbonate from CO and methyl nitrite, can solve the problems that catalyst activity and service life cannot be balanced, achieve high space-time yield, improve Dispersion, the effect of eliminating chlorine loss

Active Publication Date: 2016-03-02
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the problem that catalyst activity and service life cannot be taken into account in the prior art and the problem that chlorine-containing catalyst corrodes equipment, and provides a catalyst for synthesizing dimethyl carbonate by an indirect gas phase method and a preparation method thereof

Method used

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  • Catalyst for synthesizing dimethyl carbonate through indirect vapor phase method and preparation method of catalyst
  • Catalyst for synthesizing dimethyl carbonate through indirect vapor phase method and preparation method of catalyst
  • Catalyst for synthesizing dimethyl carbonate through indirect vapor phase method and preparation method of catalyst

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Effect test

Embodiment 1

[0015] 0.17gPdCl 2 Dissolve with 15ml ammonia water, 0.54gCuCl 2 2H 2 O and 0.34g KCl were dissolved in 20ml of water. After the two were completely dissolved, they were mixed and diluted to 100ml with water, and the pH value was adjusted to 10 with ammonia water and dilute hydrochloric acid. This solution is slowly poured in the round-bottomed flask that has 10g through the NaY molecular sieve that has been treated with alkali, and magnetic force stirs 5 hours under 30 ℃, makes the metal cation in the main active component precursor and the assistant active component precursor and The cations in the carrier are fully exchanged. Then the temperature was raised to 80°C, and the ammonia in the solution was evaporated until the pH value was neutral. Suction filtration, washing, and drying at 110° C. for 6 hours to obtain the catalyst.

Embodiment 2

[0017] Take 0.25gPd(NO 3 ) 2 2H2O, add 15ml ammonia water, 0.75gCu(NO 3 ) 2 ·3H 2 Dissolve O in 20ml of water. After the two are completely dissolved, mix and dilute with water to 100ml. Use ammonia water and dilute hydrochloric acid to adjust the pH value to 10. This solution is slowly poured into the round-bottomed flask that has 10g through the NaY molecular sieve that has been treated with alkali, magnetically stirred 5 hours under 40 ℃, makes the metal cation in the main active component precursor and the assistant active component precursor and The cations in the carrier are fully exchanged. Then the temperature was raised to 90°C, and the ammonia in the solution was evaporated until the pH value was neutral. Suction filtration, washing, and drying at 110° C. for 6 hours to obtain the catalyst.

Embodiment 3

[0019] 0.255gPdCl 2 Dissolve with 15ml ammonia water, 0.81gCuCl 2 2H 2 Dissolve O in 20ml of water. After the two are completely dissolved, mix and dilute with water to 100ml. Use ammonia water and dilute hydrochloric acid to adjust the pH value to 11. This solution is slowly poured in the round-bottomed flask that has 10g through the NaX molecular sieve that has been treated with alkali, magnetically stirred 5 hours under 30 ℃, makes the metal cation in the main active component precursor and auxiliary active component precursor and The cations in the carrier are fully exchanged. Then the temperature was raised to 70°C, and the ammonia in the solution was evaporated until the pH value was neutral. Suction filtration, washing, and drying at 110° C. for 6 hours to obtain the catalyst.

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Abstract

The invention discloses a catalyst for synthesizing dimethyl carbonate through an indirect vapor phase method and a preparation method of the catalyst. The main active component of the catalyst is palladium, the assistant active component of the catalyst is Co or Cu or Ni or La or Ce or K, and the carrier of the catalyst is a NaX type molecular sieve or a NaY type molecular sieve or a Beta molecular sieve or an MCM-41 molecular sieve or a ZSM-35 molecular sieve. The main active component in the catalyst accounts for 0.1-3% of the total mass of the catalyst, and the assistant active component in the catalyst accounts for 0.1-10% of the total mass of the catalyst. The preparation method of the catalyst is characterized in that the catalyst is prepared through an ion exchange ammonia distillation method. According to the method, the active components and positive ions on the carrier can be exchanged, so that the chloride-free catalyst is obtained. When applied to the reaction of preparing dimethyl carbonate through CO and methyl nitrite vapor phase synthesis, the catalyst can eliminate the problems of equipment corrosion and inactivation caused by a chlorine-containing catalyst and is good in stability and high in yield.

Description

technical field [0001] The invention belongs to the catalytic technical field of CO gas-phase coupling synthesis of alkyl carbonate, and in particular relates to a catalyst for CO and methyl nitrite gas-phase synthesis of dimethyl carbonate and a preparation method thereof. Background technique [0002] Dimethyl carbonate (English name DimethylCarbonate, referred to as DMC), the molecular formula is C 3 h 6 o 3 , the structural formula is (CH 3 O) 2 CO. The structure contains functional groups such as carbonyl, methyl, and methoxy, so DMC has good reactivity and can participate in a variety of organic reactions. It is called a new cornerstone of organic chemistry; and DMC is non-toxic, non-corrosive, and can replace Toxic chemicals such as phosgene and dimethyl sulfate are green chemicals; DMC also has the effect of increasing the octane number of gasoline because of its high oxygen content, and can be used as a gasoline additive; in addition, it is used in medicine, pe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/14C07C68/06C07C69/96
Inventor 姚元根郭榕覃业燕陈建珊潘鹏斌张鑫黄园园
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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